What is SEO(Search Engine Optimization)
SEO is a technique which helps the search engines to find and pagerank your website higher than the millions of other sites in response with the keywords .
SEO thus helps you get good traffic from search engines for the business.
This is the tutorial with the important information about seo and how it works and the link to understand.
For example :
Suppose your companywebsite name broadcommunucation.com. Then you have to target with keywords to get good ranking to your site. For that you will optimize the website and then make promotion through social media like facebook, twitter, emailers etc.
Further information you can view a link.